diff --git a/homeassistant/components/knocki/strings.json b/homeassistant/components/knocki/strings.json
index b7a7daad1fc..8f5d0161166 100644
--- a/homeassistant/components/knocki/strings.json
+++ b/homeassistant/components/knocki/strings.json
@@ -11,6 +11,9 @@
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
+    },
+    "abort": {
+      "already_configured": "[%key:common::config_flow::abort::already_configured_service%]"
     }
   },
   "entity": {